Display Console Output on the build page (behind an experimental flag) (#10115)

Co-authored-by: Tim Jacomb <21194782+timja@users.noreply.github.com>

core/src/main/java/hudson/Functions.java

@@ -143,6 +143,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
 import java.util.SortedMap;
 import java.util.TimeZone;
@@ -158,6 +159,7 @@ import java.util.logging.SimpleFormatter;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import jenkins.console.ConsoleUrlProvider;
+import jenkins.console.DefaultConsoleUrlProvider;
 import jenkins.console.WithConsoleUrl;
 import jenkins.model.GlobalConfiguration;
 import jenkins.model.GlobalConfigurationCategory;
@@ -1993,6 +1995,14 @@ public class Functions {
         return consoleUrl != null ? Stapler.getCurrentRequest().getContextPath() + '/' + consoleUrl : null;
     }
 
+    /**
+     * @param run the run
+     * @return the Console Provider for the given run, if null, the default Console Provider
+     */
+    public static ConsoleUrlProvider getConsoleProviderFor(Run<?, ?> run) {
+        return Optional.ofNullable(ConsoleUrlProvider.getProvider(run)).orElse(new DefaultConsoleUrlProvider());
+    }
+
     /**
      * Escapes the character unsafe for e-mail address.
      * See <a href="https://en.wikipedia.org/wiki/Email_address">the Wikipedia page</a> for the details,

core/src/main/java/jenkins/console/ConsoleUrlProvider.java

@@ -83,11 +83,7 @@ public interface ConsoleUrlProvider extends Describable<ConsoleUrlProvider> {
         return Stapler.getCurrentRequest().getContextPath() + '/' + run.getConsoleUrl();
     }
 
-    /**
-     * Looks up the {@link #getConsoleUrl} value from the first provider to offer one.
-     * @since 2.476
-     */
-    static @NonNull String consoleUrlOf(Run<?, ?> run) {
+    static List<ConsoleUrlProvider> all() {
         final List<ConsoleUrlProvider> providers = new ArrayList<>();
         User currentUser = User.current();
         if (currentUser != null) {
@@ -105,8 +101,20 @@ public interface ConsoleUrlProvider extends Describable<ConsoleUrlProvider> {
         if (globalProviders != null) {
             providers.addAll(globalProviders);
         }
+        return providers;
+    }
+
+    static ConsoleUrlProvider getProvider(Run<?, ?> run) {
+        return all().stream().filter(provider -> provider.getConsoleUrl(run) != null).findFirst().orElse(null);
+    }
+
+    /**
+     * Looks up the {@link #getConsoleUrl} value from the first provider to offer one.
+     * @since 2.476
+     */
+    static @NonNull String consoleUrlOf(Run<?, ?> run) {
         String url = null;
-        for (ConsoleUrlProvider provider : providers) {
+        for (ConsoleUrlProvider provider : all()) {
             try {
                 String tempUrl = provider.getConsoleUrl(run);
                 if (tempUrl != null) {

core/src/main/java/jenkins/model/experimentalflags/NewBuildPageUserExperimentalFlag.java

@@ -0,0 +1,49 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2025, Jan Faracik
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package jenkins.model.experimentalflags;
+
+import edu.umd.cs.findbugs.annotations.Nullable;
+import hudson.Extension;
+import org.kohsuke.accmod.Restricted;
+import org.kohsuke.accmod.restrictions.NoExternalUse;
+
+@Extension
+@Restricted(NoExternalUse.class)
+public class NewBuildPageUserExperimentalFlag extends BooleanUserExperimentalFlag {
+    public NewBuildPageUserExperimentalFlag() {
+        super("new-build-page.flag");
+    }
+
+    @Override
+    public String getDisplayName() {
+        return "New build page";
+    }
+
+    @Nullable
+    @Override
+    public String getShortDescription() {
+        return "Enables a revamped build page. This feature is still a work in progress, so some things might not work perfectly yet.";
+    }
+}